Select Chapter Topics:
Q. No.Assertion (A): Aschelminths and Annelids possess bilateral symmetry.
Reason (R): Both Aschelminths and Annelids are coelomates
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Phylum Annelida | Phylum Arthropoda |
80%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
| Assertion (A): | Choanocytes or collar cells line the spongocoel and the canals in poriferans. |
| Reason (R): | Poriferans possess spicules and spongin fibres. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Phylum Porifera |
80%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Assertion (A): All vertebrates are chordates but all the chordates are not vertebrates.
Reason (R): All the vertebrates are characterised by the presence of a notochord, a dorsal hollow nerve cord and paired pharyngeal gill slits at some stages of the life cycle.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Reason (R): All the vertebrates are characterised by the presence of a notochord, a dorsal hollow nerve cord and paired pharyngeal gill slits at some stages of the life cycle.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic: General Introduction: Vertebrates & Agnatha |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Choose the correct statement
1. Metamerism first developed in Arthropoda
2. Triploblastic animals lacking coelom are platyhelminths and annelids
3. Coelomate animals in which blastopore forms anus are grouped under deuterostomes
4. Coelom is the body cavity found between ectoderm and outer body wall
1. Metamerism first developed in Arthropoda
2. Triploblastic animals lacking coelom are platyhelminths and annelids
3. Coelomate animals in which blastopore forms anus are grouped under deuterostomes
4. Coelom is the body cavity found between ectoderm and outer body wall
Subtopic: Phylum Arthropoda |
65%
Please attempt this question first.
Hints
Read the following statements:
i. Longitudinal and circular muscles exist
ii. Body wall remains covered by the glandular epidermis
iii. Metamerism present
iv. Closed blood vascular system
The above statements exemplify which organism?
1. Flatworm
2. Ophiura
3. Wuchereria
4. Earthworm
i. Longitudinal and circular muscles exist
ii. Body wall remains covered by the glandular epidermis
iii. Metamerism present
iv. Closed blood vascular system
The above statements exemplify which organism?
1. Flatworm
2. Ophiura
3. Wuchereria
4. Earthworm
Subtopic: Phylum Annelida |
87%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Which of the following is correct?
1. Archaeopteryx is thought to be the transitional fossil between dinosaurs and birds since, like birds Archaeopteryx had feathers and a fused collar-bone indicating the flying ability
2. Cloaca is present in Balenoptera
3. In Physalia, digestion is first extracellular and then intracellular digestion occurs
4. Both (1) and (iii)
1. Archaeopteryx is thought to be the transitional fossil between dinosaurs and birds since, like birds Archaeopteryx had feathers and a fused collar-bone indicating the flying ability
2. Cloaca is present in Balenoptera
3. In Physalia, digestion is first extracellular and then intracellular digestion occurs
4. Both (1) and (iii)
Subtopic: Study of Aves & Mammals |
80%
Please attempt this question first.
Hints
Please attempt this question first.
Choose the correct match:
1. Branchostoma : Notochord persist through out the life
2. Ascidia : Notochord present in larva and disappears in adult
3. Doliolum : Notochord present in the larval tail only
4. More than one option is correct
1. Branchostoma : Notochord persist through out the life
2. Ascidia : Notochord present in larva and disappears in adult
3. Doliolum : Notochord present in the larval tail only
4. More than one option is correct
Subtopic: Phylum Hemichordata | General Introduction: Vertebrates & Agnatha |
82%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Lampreys:
1. May or may not possess jaw
2. Is included in the division Agnatha where notochord is present only in the early stages
3. Possess an elongated body with gill slits for respiration
4. Are devoid of scales and possess paired fins
1. May or may not possess jaw
2. Is included in the division Agnatha where notochord is present only in the early stages
3. Possess an elongated body with gill slits for respiration
4. Are devoid of scales and possess paired fins
Subtopic: General Introduction: Vertebrates & Agnatha |
51%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
What is/are the advantage(s) of coelom?
1. Can absorb shock or provide a hydrostatic skeletal system
2. Less freedom for movement
3. Allows organ to expand
4. Both (1) and (3)
1. Can absorb shock or provide a hydrostatic skeletal system
2. Less freedom for movement
3. Allows organ to expand
4. Both (1) and (3)
Subtopic: Basis of Classification:I | Basis of Classification:II | Basis of Classification |
90%
Please attempt this question first.
Hints
Read the following statements:
i. Snakes lack urinary bladder
ii. Air sacs in birds are helpful to lessen the body weight, keep the body warm, regulate body temperature and help in blood circulation
iii. Bone marrow is abundantly present in birds
iv. Devil fish belongs to the phylum Mollusca
v. Sea urchin has mouth on lower side and anus on the upper side
How many of the above statements are incorrect?
1. One
2. Three
3. Two
4. Four
i. Snakes lack urinary bladder
ii. Air sacs in birds are helpful to lessen the body weight, keep the body warm, regulate body temperature and help in blood circulation
iii. Bone marrow is abundantly present in birds
iv. Devil fish belongs to the phylum Mollusca
v. Sea urchin has mouth on lower side and anus on the upper side
How many of the above statements are incorrect?
1. One
2. Three
3. Two
4. Four
Subtopic: Phylum Arthropoda | Study of Aves & Mammals |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Select Chapter Topics:
© 2024 GoodEd Technologies Pvt. Ltd.